1602test.c

三星公司的一款1602vfd显示屏

//ICC-AVR application builder : 2006-11-14 10:39:01
// Target : M16
// Crystal: 4.0000Mhz

#include <iom16v.h>
#include <macros.h>
#define vfd_data_port PORTB
#define vfd_data_ddr DDRB
#define vfd_busy_pin PINB
#define vfd_busy_ddr DDRB
#define vfd_control_port PORTD
#define vfd_control_ddr DDRD
#define vfd_RS 0x20 //PORTD^5
#define vfd_EN 0x40 //PORTD^6
#define vfd_RW 0x80 //PORTD^7
//#define vfd_RW 0x40 //PORTD^1
//#define vfd_EN 0x80 //PORTD^2
#define busy 0x80 //VFD_DB7
struct sem
  {
   	unsigned int 	ad_samp;			 //a/d sampling data
    unsigned int 	pc_trans;		 	 //pc transfer to chip
	unsigned char	class_addr[4];		 //data addr
	unsigned char 	class_data[7];	 	 //asc ii code from pc to chip or chip to pc 
  }dypass[9]; 
unsigned char 		adc_mux,i;
unsigned int  		adc_rel,adc_old,sin;
unsigned char  		adc_meas[20];
unsigned char  		hex_meas[5];
unsigned char 		rece_coun;
unsigned char  		meas_coun;
unsigned char 		*point;
unsigned char 		channel;//sampling channel
/*----------------------------------函数声明------------------------------------------*/
void vfd_init(void);
void vfd_write_command(unsigned char command,unsigned char wait_en);
void vfd_write_data(unsigned char char_data);
void wait_enable(void);
void display_a_char(unsigned char position,unsigned char char_data);
void d_a_s(unsigned char col,unsigned char *ptr);
void display_a_ch_r(unsigned char position,unsigned char char_data);
void delay_1ms(void);
void delay_nms(unsigned int n);
void adc_init(void);
void filter(unsigned char maj);
void hex_asc(unsigned int dt_meas,unsigned char *g);
//显示的两行字符
unsigned char str1[]="NO1:     NO2:   ";
unsigned char str2[]="NO3:     NO4:   ";
const unsigned char t_per[255]={
	0x99,0x99,0x99,0x99,0x99,0x99,0x99,0x99,0x99,0x99,//0~9
	0x99,0x99,0x99,0x99,0x98,0x97,0x96,0x95,0x94,0x93,//10~19 
	0x92,0x90,0x89,0x88,0x86,0x85,0x84,0x83,0x82,0x81,//20~29
	0x80,0x78,0x77,0x76,0x75,0x74,0x73,0x72,0x71,0x70,//30~39 
	0x70,0x69,0x68,0x67,0x66,0x65,0x64,0x63,0x62,0x61,//40~49 
	0x60,0x59,0x58,0x58,0x57,0x57,0x56,0x56,0x55,0x55,//50~59     
	0x54,0x53,0x53,0x52,0x51,0x50,0x50,0x49,0x49,0x48,//60~69
	0x48,0x48,0x47,0x47,0x46,0x46,0x45,0x45,0x44,0x44,//70~79
	0x44,0x43,0x43,0x43,0x42,0x42,0x41,0x41,0x40,0x40,//80~89
	0x40,0x39,0x39,0x38,0x38,0x37,0x37,0x37,0x36,0x36,//90~99
	0x35,0x35,0x35,0x34,0x34,0x33,0x33,0x33,0x32,0x32,//100~109
	0x32,0x31,0x31,0x30,0x30,0x30,0x29,0x29,0x28,0x28,//110~119
	0x27,0x27,0x27,0x27,0x26,0x26,0x26,0x25,0x25,0x24,//120~129
	0x24,0x24,0x23,0x23,0x23,0x22,0x22,0x22,0x21,0x21,//130~139
	0x21,0x20,0x20,0x20,0x19,0x19,0x19,0x18,0x18,0x18,//140~149
	0x17,0x17,0x16,0x16,0x16,0x15,0x15,0x15,0x14,0x14,//150~159
	0x14,0x13,0x13,0x13,0x12,0x12,0x12,0x11,0x11,0x11,//160~169
	0x10,0x10,0x9,0x9,0x9,0x8,0x8,0x7,0x7,0x6,//170~179 
	0x6,0x6,0x5,0x5,0x5,0x4,0x4,0x3,0x3,0x2,//180~189
	0x2,0x1,0x1,0x0,0x0,0x0,0x0,0x1,0x1,0x2,//190~199     
	0x2,0x3,0x3,0x4,0x4,0x3,0x5,0x5,0x5,0x6,//200~209
	0x7,0x8,0x9,0x9,0x10,0x10,0x11,0x11,0x12,0x12,//210~219
	0x13,0x13,0x14,0x14,0x15,0x15,0x16,0x16,0x17,0x17,//220~229
	0x18,0x18,0x19,0x20,0x21,0x22,0x23,0x24,0x25,0x26,//230~239
	0x27,0x28,0x29,0x30,0x31,0x32,0x33,0x34,0x35,0x36,//240~249
	0x37,0x38,0x39,0x40,0x50,};//250~254
/*------------------------------------主函数-------------------------------------------*/
//在VFD上显示hello和www.xmbyte.com两行字符
void main(void)
{
 adc_init();
 vfd_data_port=0xff;
 vfd_data_ddr=0xff;
 vfd_control_port=0xF0;
 vfd_control_ddr=0xF0;
 DDRC  = 0xFF;
 PORTC = 0xff; //m103 output only
 
 vfd_init();
 //d_a_s(0,str1);
 //d_a_s(1,str2);
 while(1)
 {
 PORTC=0XFF;
 vfd_write_command(0xf,1);
 vfd_write_command(0x6,1);
 d_a_s(0,str1);
 
 //A/D 采样四个通道
  filter(0);
  filter(1);
  filter(2);
  filter(3);
  sin=4;
  for(i=2;i<=3;i++)
  {
  	  str1[sin]=dypass[0].class_data[i];
	  sin++;
  }
  str1[6]=0x1a;
  sin=13;
  for(i=2;i<=3;i++)
  {
    str1[sin]=dypass[1].class_data[i];
    sin++;
  }
    str1[15]=0x1a;
  sin=4;
  for(i=2;i<=3;i++)
  {
  str2[sin]=dypass[2].class_data[i];
  sin++;
  }
  str2[6]=0x1a;
  sin=13;
  for(i=2;i<=3;i++)
  {
    str2[sin]=dypass[3].class_data[i];
    sin++;
  }
    str2[15]=0x1a;
  d_a_s(0,str1);
  d_a_s(1,str2);
   
  delay_nms(1000);
 PORTC=0X00;
 delay_nms(1000);
 d_a_s(1,str2);
 }
} 
void adc_init(void)
{
 DDRA=0x00;
 PORTA=0x00; 
 ADCSRA = 0x00; 
 ADMUX =(1<<REFS0)|(adc_mux&0x0f);//选择内部AVCC为基准
 ACSR  =(1<<ACD);//关闭模拟比较器
 ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADPS2)|(1<<ADPS1) ;//64分频
}

//将无符号的整形数转换为asc码，保存于指针g开始的连续四个空间
void hex_asc(unsigned int dt_meas,unsigned char *g)
{
 *g=(unsigned char)(dt_meas/0x1000);
 if(*g<10)
 	*g+=0x30;
	else *g+=0x37;
 g++;
 *g=(unsigned char)((dt_meas/0x100)%0x10);
 if(*g<10)
 	*g+=0x30;
	else *g+=0x37;
 g++;
 *g=(dt_meas%0x100)/0x10;
 if(*g<10)
 	*g+=0x30;
	else *g+=0x37;
 g++;
 *g=(dt_meas%0x100)%0x10;
 if(*g<10)
 	*g+=0x30;
	else *g+=0x37;
}

void filter(unsigned char maj)
 {	   unsigned char *q,y,wendu;
 	   unsigned int ad_temp[18],phillp=0;
	   if(maj!=8)
	   {
  	   		ADMUX=0x40+maj;
	   		ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADPS2)|(1<<ADPS1) ;//64分频	  
	   		for(y=0;y<=16;y++)
	   	      { ADCSRA |= 0x40;                      // Start a new A/D conversion
      	  	  	while (!(ADCSRA & (1<<ADIF)));       // wait until ADC is ready  
	   	  		ad_temp[y]=ADC&0X3FF;
	   	  	  }
	   	  	for(y=6;y<=13;y++)
	   	  		phillp+=ad_temp[y];
	   	  		adc_rel=phillp/32;
				y=adc_rel;				
	   	  		wendu=t_per[y];
				//y=dypass[maj].ad_samp;
		}
		 else {
		 	   channel=PORTD;
			   adc_rel=(unsigned int)channel;
			   dypass[maj].ad_samp=adc_rel;
			  }
	   //	dypass[maj].class_data[0]=" ";
		//dypass[maj].class_data[1]=" ";
		dypass[maj].class_data[2]=0x30+wendu/16;
		dypass[maj].class_data[3]=0x30+wendu%16;
	   		  
 }
/*------------------------------------液晶驱动函数-------------------------------------*/
//液晶初始化
void vfd_init(void)
{
 delay_nms(15);
 vfd_write_command(0x38,0);//显示模式设置三次(此时不管vfd空闲与否)
 delay_nms(5);
 vfd_write_command(0x38,0);
 delay_nms(5);
 vfd_write_command(0x38,0);
 delay_nms(5);
 
 vfd_write_command(0x38,1);//显示模式设置(从此之后均需vfd空闲)
 vfd_write_command(0x08,1);//显示关闭
 vfd_write_command(0x01,1);//显示清屏
 vfd_write_command(0x06,1);//显示光标移动设置
 vfd_write_command(0x0c,1);//显示开及光标设置
}
//写指令函数: E=高脉冲 RS=0 RW=0
void vfd_write_command(unsigned char command,unsigned char wait_en)//command为指令，wait_en指定是否要检测VFD忙信号
{
 if(wait_en)wait_enable();//若wait_en为1，则要检测VFD忙信号，等待其空闲
 vfd_control_port&=~vfd_RS;//RS=0
 vfd_control_port&=~vfd_RW;//RW=0
 vfd_control_port&=~vfd_EN;//E=0,下面给VFD一个高脉冲
 NOP();
 vfd_control_port|=vfd_EN;//E=1
 vfd_data_port=command;
 vfd_control_port&=~vfd_EN;//重设E=0
}
//写数据函数: E =高脉冲 RS=1 RW=0
void vfd_write_data(unsigned char char_data)
{
 wait_enable();//等待VFD空闲
 vfd_control_port|=vfd_RS;//RS=1
 vfd_control_port&=~vfd_RW;//RW=0

 vfd_control_port&=~vfd_EN;//E=0,下面给VFD一个高脉冲
 NOP();
 vfd_control_port|=vfd_EN;//E=1
 vfd_data_port=char_data;
 vfd_control_port&=~vfd_EN;//重设E=0
} 
//正常读写操作之前必须检测VFD控制器状态:E=1 RS=0 RW=1;DB7: 0 VFD控制器空闲，1 VFD控制器忙。
//检测忙信号,等待VFD空闲函数
void wait_enable(void)
{
 //delay_nms(10);
 vfd_busy_ddr&=~busy;//设置busy口为输入
 vfd_control_port&=~vfd_RS;//RS=0
 vfd_control_port|=vfd_RW;//RW=1
 NOP();
 vfd_control_port|=vfd_EN;//E=1
 while(vfd_busy_pin&busy);//等待VFD_DB7为0
 vfd_control_port&=~vfd_EN;//重设E=0
 vfd_busy_ddr|=busy;//设置busy口为输出
}
//指定位置显示一个字符:第一行位置0~15,第二行16~31
//显示一个字符函数
void display_a_char(unsigned char position,unsigned char char_data)//参数position指定位置0~31,char_data为要显示的字符
{
 unsigned char position_tem;
 if(position>=0x10)
 position_tem=position+0xb0;
 else
 position_tem=position+0x80;
 vfd_write_command(position_tem,1);
 vfd_write_data(char_data);
}
//指定一行显示连续字符串:0显示在第一行,1显示在第二行,注字符串不能长于16个字符
//显示一行连续字符串函数
void d_a_s(unsigned char col,unsigned char *ptr)//参数col指定行,*ptr指字符串数组的首指针
{
 unsigned char col_tem,i;
 col_tem=col<<4;//若col为1(即在VFD第二行显示字符串),先把col左移4位,使显示字符的首位置改到第二行首位,即位置16
 for(i=0;i<16;i++)
 display_a_char(col_tem++,*(ptr+i));
 }
//光标定位子程序
void display_a_ch_r(unsigned char position,unsigned char char_data)//参数position指定位置0~31,char_data为要显示的字符
{
 unsigned char position_tem;
 if(position>=0x10)
 position_tem=position+0xb0;
 else
 position_tem=position+0x80;
 vfd_write_command(position_tem,1);
 vfd_write_data(char_data);
 vfd_write_command(position_tem,1);
}
/*---------------------------------------延时函数-------------------------------------*/
//1ms延时函数
void delay_1ms(void)
{
 unsigned int i;
 for(i=0;i<600;i++);
}
//n ms延时函数
void delay_nms(unsigned int n)
{
 unsigned int i;
 for(i=0;i<n;i++)delay_1ms();
}